[Nox Noctis]

http://www.alvechurchdata.co.uk/vbpixel.htm

Pixel
This is a "picture element" and is the smallest area of screen that you can control. You can set or test the colour of a pixel but you can't do anything with colours within a pixel. The Control Panel measures the screen sizes in pixels; typical sizes are 640 x 480 or 1280 x 1024 pixels.

Point
The point is a traditional printer's measure of font size on paper. One point was 1/72nd of an inch. The pica is 12 points or 1/6th of an inch.

Twip
A device-independent measurement defined as 1/20th of a point. This equates to 1/1440th of an inch or about 1/567th of a centimetre. There is also a logical twip, this is the length on screen that will be one twip long when printed.